The related A genome species of the Oryza genus are the effective gene pool for rice. Here, we report draft genomes for two Australian wild A genome taxa: O. rufipogon-like population, referred to as Taxon A, and O. meridionalis-like population, referred to as Taxon B. These two taxa were sequenced and assembled by integration of short- and long-read next-generation sequencing (NGS) data to create a genomic platform for a wider rice gene pool. Here, we report that, despite the distinct chloroplast genome, the nuclear genome of the Australian Taxon A has a sequence that is much closer to that of domesticated rice (O. sativa) than to the other Australian wild populations. Analysis of 4643 genes in the A genome clade showed that the Australian annual, O. meridionalis, and related perennial taxa have the most divergent (around 3 million years) genome sequences relative to domesticated rice. A test for admixture showed possible introgression into the Australian Taxon A ( diverged around 1.6 million years ago) especially from the wild indica/O. nivara clade in Asia. These results demonstrate that northern Australia may be the centre of diversity of the A genome Oryza and suggest the possibility that this might also be the centre of origin of this group and represent an important resource for rice improvement.
| Identifer | oai:union.ndltd.org:arizona.edu/oai:arizona.openrepository.com:10150/624392 |
| Date | 06 1900 |
| Creators | Brozynska, Marta, Copetti, Dario, Furtado, Agnelo, Wing, Rod A., Crayn, Darren, Fox, Glen, Ishikawa, Ryuji, Henry, Robert J. |
| Contributors | Univ Arizona, Arizona Genom Inst, Sch Plant Sci, Queensland Alliance for Agriculture and Food Innovation; University of Queensland; Brisbane QLD Australia, Arizona Genomics Institute; School of Plant Sciences; University of Arizona; Tucson AZ USA, Queensland Alliance for Agriculture and Food Innovation; University of Queensland; Brisbane QLD Australia, Arizona Genomics Institute; School of Plant Sciences; University of Arizona; Tucson AZ USA, Australian Tropical Herbarium; James Cook University; Cairns QLD Australia, Queensland Alliance for Agriculture and Food Innovation; University of Queensland; Toowoomba QLD Australia, Faculty of Agriculture and Life Science; Hirosaki University; Hirosaki Aomori Japan, Queensland Alliance for Agriculture and Food Innovation; University of Queensland; Brisbane QLD Australia |
| Publisher | WILEY |
| Source Sets | University of Arizona |
| Language | English |
| Detected Language | English |
| Type | Article |
| Rights | © 2016 The Authors. Plant Biotechnology Journal published by Society for Experimental Biology and The Association of Applied Biologists and John Wiley & Sons Ltd. This is an open access article under the terms of the Creative Commons Attribution License |
| Relation | http://doi.wiley.com/10.1111/pbi.12674 |
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